ChinesePod

1 lit. the other mountain's stone can polish jade (idiom); to improve oneself by accepting criticism from outside
2 to borrow talent from abroad to develop the nation effectively

以子之矛，攻子之盾

yǐ zǐ zhī máo , gōng zǐ zhī dùn

1 lit. use sb's spear to attack his shield (idiom, derived from Han Feizi 韓非子|韩非子); turning a weapon against its owner
2 fig. to attack an opponent using his own devices
3 hoist with his own petard

出其不意，攻其不备

chū qí bù yì , gōng qí bù bèi

1 to catch an enemy off guard with a surprise attack (idiom, from Sunzi's "The Art of War" 孫子兵法|孙子兵法[Sūn zǐ Bīng fǎ])

Sample Sentences

大家看成龙也就是看他的功夫表演。在影片里他的身手特别炫，但是行家看起来就没什么深度了，攻击力也不强。

dàjiā kàn ChéngLóng yějiùshì kàn tā de gōngfu biǎoyǎn 。zài yǐngpiàn lǐ tā de shēnshǒu tèbié xuàn ，dànshì hángjiā kànqǐlái jiù méishénme shēndù le ，gōngjī lì yě bùqiáng 。

Oh, you sound like a real expert.

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